There is a description of changes between v1 and v2 in the descriptions on NyaaTorrents.

In the case of Mura Matsuri, the v2 is the same as v1 but in better quality. But Saru Masamune v2 has the talkie soundtrack while the v1 has the instrumental soundtrack, and I could not add that track to the v2 because the video lengths are different so I could not sync them together.

If you just want to see a movie then get the v2, I would not upload a v2 that is worse than a v1. That is why there is only one version (so far) of Haru no Uta (which combines both the talkie audio track from The Roots of Japanese Anime and the instrumental track from Japanese Anime Classic Collection).